218 HutorkalElogeofM. Vanquelin, 



{the quantity submitted to analysis; but, at the request of Haiiy, 

 he renewed the examination, and was rewarded by the disco- 

 very of glaucine, which thus heQ&xm.JkJS^XtsS.Qf tiivuDoph for 

 crystallography. rtf^nl^ r mom ^ bCfio-. sno orr 



. A still more briUiant discovery was that of the substance 

 called Chr,o?7ie, — ^a name bestowed on it in consequence of the 

 -beautiful colours it assumes at different degrees of oxidation, 

 and which it imparts to the minerals with which it is associated. 

 rXhe bright scarlet of the red lead of Siberia, the rose colour of 

 4he spinelle ruby, and the pure green of the emerald, are pro- 

 duced by the acid and oxide of this metal ^ An orange-yellow 

 is produced from it, which forms one of the clearest and most 

 durable colours which painters can employ, and an enamel of 

 the only pure and deep green which admits of being applied to 

 hard porcelain. M. Laugier likewise detected this substance in 

 stones which had fallen from the atmosphere. 

 - The late M. Delille, to whom the singular property of this 

 new metal was explained, inspired by phenomena of so remark- 

 able a character, composed almost extemporaneously some beau- 

 tiful verses, in which he has expressed them with much feli- 

 city: <BjsiiQdiiu 



Peintre des min^raiix, de nos plus belles fleurs, 

 II distribue entre eux les brillantes couleurs ; . 

 L'emeraude par lui d'un beau vert se colore ; 

 II transmet au rubis la pourpre de I'aurore ; 

 Quelquefois d'un plomb vil, fidele associe, 

 Teint d'un vif incarnat son obscur allie ; 

 Tantot rival heureux des couleurs japonalses, 

 Avant qu' elle ait de Sevres endur^ les foumaises, 

 II peint la porcelaine, et lui prete a nos yeux, 

 Ces fonds verts et brillants qui r^sistent aux feux. 

 Notre siecle en est fler, et, par un juste homage, 

 5 Un jour Vauquelin y gravera I'image. 



Les Trois R^gnes, Chant V. 



No friend of literature will doubt, that the verses of Delille will 

 form for our associate a more lasting monument than any images 

 "of whatever metal they may be composed. For himself,' monu- 

 iments interested him but little ; a nev/ fact in chemistry would 

 nave been of more importance in his eyes than the opinion of 



' Journal de la Soc. des Pharm. 1798, p. 174. 



